Question

抱歉我的英语：）

我是Codeigniter的新手，开始学习编写简单的博客我有3张桌子

Table 1 'news'
---------------------------------
id | title | slug | text | image |
---------------------------------
Table 2 'categories'
----------
id | name |
----------
Table 3 'news_cat'
---------------------------
id | news_id | category_id |
---------------------------
in this table `id` is autoincrement

我希望看到这些类别有哪些帖子来自＆＃39; news＆＃39;在我的视图页面

查看档案

<?php foreach ($news as $news_item): ?>

   <?php echo $news_item['title'] ?>

   <p><?=$news_item['text'] ?>
<? foreach($news_item['cat_data'] as $cat_data):?>
The category is:<?=$cat_data ?>

<?php endforeach;?>

<?php if(!empty($news_item['image'])) { ?>
<img  src ="/uploads/<?=$news_item['image'];?>">
<?php } ?>

<a href="news/<?=$news_item['slug'] ?>">View article</a>

Controller

public function index()
{

$data['news'] = $this->news_model->get_news();

foreach ($data['news'] as $key => $value) :
    $id = $data['news'][$key]['id'];
 $data['news'][$key]['cat_data'] = $this->categories_model->get_by_id($id);
    // IN THIS I HAVE QUESTION, how insert in my array several values by method           get_by_id() and what must have this method

$data['title'] = 'News archive';
$this->load->view('templates/header', $data);
$this->load->view('news/index', $data);
$this->load->view('templates/footer');

}

模型公共函数get_by_id（$ id） {

  in this model i think i need use JOIN, but how i don`t know

}

Answer 1

希望以下代码示例可以帮助您..如果我理解您的问题，这将为您提供类别名称和ID值列表

$this->db->select('categories.name,categories.id');
$this->db->from('categories');
$this->db->join('news_cat',"news_cat.category_id= categories.id");
$query = $this->db->get();
$data['category_list']=$query->result_array();

笨。从3个表中的数据库中获取值（多对多）

1 个答案: